This event will swap in your skinning gear (likely Finkles) when you mouseover something that can be skinned. It swaps back to your normal gear when you mouseover something/someone else. A variation can be made to switch to skinning gear if you trigger on UI_ERROR_MESSAGE with the exact text when your skill is too low, then swap out when you finish looting on trigger LOOT_CLOSE. Not having a skinner I really can't test this. Feel free to post if you do make one :)

Event: SkinningTrigger: UPDATE_MOUSEOVER_UNITDelay: 0Script:
if UnitIsDead("mouseover") and
GameTooltipTextLeft3:GetText()=="Skinnable" then
if not SKINNINGMODE then
SaveSet()
EquipSet()
SKINNINGMODE=1
end
elseif SKINNINGMODE then
LoadSet()
SKINNINGMODE=nil
end
--[[Equips a set when you mouseover something that can be skinned.]]

Evocation

This macro/event pair will swap in your spirit gear when you begin casting Evocation and then swap it out when you're done.